Treats internal parasites Treats external parasites Safe for plants and invertebrates This is great for internal tapeworms and some external parasites. This is dosed as a 1-week treatment for parasites and is safe for plants, shrimp, and snails. It can also be used to treat fish in quarantine. We recommend using an air stone in the aquarium when treating with Prazi Pro. Good for treating: Flukes Flatworms Tapeworms Turbellarians Dosing Instructions: Shake vigorously before use, and dose 1 teaspoon per 20 gallons of water. A single dose lasting 5-7 days is normally sufficient. Repeat as necessary but no more than once every 3 days.   4oz bottle treats 480 gallons. 1oz bottle treats 120 gallons.  Contents: Oxybispropanol (as an inert solubilizing agent) and <5% praziquantel by weight.